Re: C++ is Slow?

From:

=?UTF-8?B?RXJpayBXaWtzdHLDtm0=?= <Erik-wikstrom@telia.com>

Newsgroups:

comp.lang.c++

Date:

Wed, 06 Feb 2008 22:17:46 GMT

Message-ID:

<emqqj.3533$R_4.2718@newsb.telia.net>

On 2008-02-06 18:04, nw wrote:

Having op[] return a dummy object is a poor idea, it makes it harder to
drop in different implementations. Only do something like that if you
absolutely have to. See the FAQ for more about this subject.

http://www.parashift.com/c++-faq-lite/operator-overloading.html#faq-1...

hmm... ok, the FAQ makes a good point. But raises a couple of
questions.

Firstly is it possible to create a generalizable n-dimensional matrix
using this method?

Secondly is there anyway to make this compatible with (have a similar
interface to) a STL vector? It would be nice to use a STL container
for now and then implement my own classes later if required and select
between them using a template parameter.

Basically does this mean I should never use a multi-dimensional
vector, because I'm cutting myself off from the possibility of
changing the container later?

That is why you should wrap it all in a class, that way you should be
able to change the internal workings without having to change the
class's external interface. That means that functions/classes using your
wrapper class can not tell the difference between the implementations.

--
Erik Wikstr??m